Process of making engraved printing-rollers.



entra n earns Parana canton JOHN W. IPPERS, OF NEW YQRK, .N. Y., ASSIG-NOR 0F ONE-HALF T0 (EARL A. ROESSEL,

i 0F BROOKLYN, NEW YORK.

EROCESS 9F MAKING ENGRAVED PRINTING-ROLLERS.

No Drawing.

To all whom it may concern:

Be it known that 1, JOHN W. Trrsns, a citizen of the United States of America, residing in New York, in the borough of Brooklyn, county of Kings, and State of New York, have invented certain new and useful Improvements in Processes of Male ing Engraved Printing-Rollers, of which the following is a specification.

This invention relates to an improved process of making printing rollers for transferring designs on silk, cotton, velvet, oilcloth, wall-paper and other fabrics.

This process is intended for making printing rollers without the use of a pantograph machine or camera negative, by transferring a drawing or design placed on a lithographic stone or metal plate onto a transparent sheet of celluloid, gelatin, coll-odion, glass or other transparent substance, then transferring the I desi to a plate repared with a sensitize coating of asp alt, albumen or gelatin by subjecting it to the action of the light through the transparent sheet, then etching the positive obtained thereby and transferring it by repeats to a metal printing roller.

In carrying out my improved process, the drawin or design to be printed by the printing rol er is made on a lithographic stone, metal or other printing surface in positive in crayon, stipple, line or half-tone effect.- The drawing or design is then etched and inked and transferred by printing it on a transparent sheet of celluloid, gelatin, collodion, glass or other transparent material. To make the printed design on the transparent sheet sharp and opaque, a coating of clear gelatin, or any other kind of transparent elastic coating, is given to the transparent sheet, From the transparent sheet the design is made on a metal (zinc) plate by subjecting it to the action of light passing through the transparent sheet, the surface of the metal plate being coated with a sensitized film of gelatin, asphaltum or albumen, the parts not acted upon by light being etched so that the drawing or design is obtained in depressed characters. The parts not depressed are then inked and transferred by repeats to the surface of a metal printing roller and the uninked part of the roller etched in the usual manner.

Specification of Letters Patent.

Fatented Sept. 26 ,1Qib.

Application filed. September 15, 1909., Serial No. 517,776.

When the roller is to be printed from, the roller is covered with ink and the ink from the undepressed part wiped off, leaving the ink in the depressed parts, from which a fabric may be printed' in the case of wall-paper, the paper is printed from the raised part of the. printing roller, and in this case the first step of the process con sists in making a negative of the design on the lithographic stone. The other ste s will be understood from the process for abrics.

My improved process of making printing rollers dispenses with the use of camera negatives, by transferring the design from the stone or other plate onto a transparent transfer-sheet and from the same by the action of light to a sensitized metallic plate, on which a positive is formed by etching, which is then transferred, by means of a repeating transfer-frame, onto a metallic printing roller for use in printing silk, cotton, velvet, oil-cloth, wall-paper and other fabrics. The transparent celluloid transfersheet can be used over and over again after the design has been transferred, by washing it ofi from the same, and then using it again for transferring a new design, and so on.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. The process herein described of making printing rollers, consisting in producing a design in relief upon a lithographic stone, printing said design directly from said stone onto a transparent celluloid plate, next photochemically printing said design upon a sensitized metallic plate by the action of light passing through the transparent plate, then etching the parts of said metallic plate not exposed to the light so as to form a negative of the design, and then transferring said desi n to a printing roller, and finally etching t he design on the roller.

2. The process herein described of making printing rollers, consisting in producing the positive of a design in relief upon a lithographic stone, printing said design directly from said stone to a transparent celluloid plate, next photochemically printing said design upon a sensitized metallic plate by the action of light passing through the transparent plate, then etching the partsof said metallic plate not exposedto the light as my invention, I have signed my name in so as to forma raised negative of the design, presence of two subscribing witnesses.

and then repeatedly transferrin said design to a printing roller until sai d roller is JOHN IPPERS' covered with the re eated design, and finally Witnesses:

etching the repeate design on the roller. PAUL GQEPEL, In testimony, that I claim the foregoing l A. J. COOK. 

